Balanced Chemical Equations
Which of the following chemical equations is balanced for both mass and charge?
AZn + Cu²⁺ → Zn²⁺ + Cu
BAg + HNO₃ → AgNO₃ + H
CNa + Cl₂ → 2NaCl
DCa + H₂SO₄ → CaSO₄ + H
EMg + O₂ → MgO
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